Starting a second campaign - how?

How do you start a new campaign? -the red button does not show any option for starting a new campaign as far as I can see. Can you start a campaign using a different website url or do you need a separate adwords account for a separate website

Only one display URL domain to be used for all ads within a particular ad group. In other words, all display URLs within an ad group need to be hosted in the same site, even the URLs for your paused ads. If you want to advertise a different site, It is suggested that you create a new campaign or a new ad group.(so no separate account is required)

Note: The domain of your display URL must match the domain of your landing page URL (after any redirects).

Only one display URL domain to be used for all ads within a particular ad group. In other words, all display URLs within an ad group need to be hosted in the same site, even the URLs for your paused ads. If you want to advertise a different site, It is suggested that you create a new campaign or a new ad group.(so no separate account is required)

Note: The domain of your display URL must match the domain of your landing page URL (after any redirects).